<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Animate a marker</title>
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <script src="../../lib/mapbox-gl.js"></script>
    <link href="../../lib/mapbox-gl.css" rel="stylesheet" />
    <script src="../../lib/axios.min.js"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }
      #map {
        position: absolute;
        top: 0;
        bottom: 0;
        width: 100%;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      let baseDataUrl = `http://${localStorage.getItem(
        "host"
      )}/mapbox-gl-js-offline-examples`;
      axios
        .get(
          baseDataUrl +
            `/resources/styles/${localStorage.getItem(
              "mbtilesStylesName"
            )}.json`
        )
        .then((res) => {
          let data = res.data;
          initMap(data);
        })
        .catch((err) => {
          console.error(err);
        });

      function initMap(style) {
        let map = new mapboxgl.Map({
          container: "map",
          center: [0, 0],
          zoom: 2,
          style: style,
        });

        var marker = new mapboxgl.Marker();

        function animateMarker(timestamp) {
          var radius = 20;

          // Update the data to a new position based on the animation timestamp. The
          // divisor in the expression `timestamp / 1000` controls the animation speed.
          marker.setLngLat([
            Math.cos(timestamp / 1000) * radius,
            Math.sin(timestamp / 1000) * radius,
          ]);

          // Ensure it's added to the map. This is safe to call if it's already added.
          marker.addTo(map);

          // Request the next frame of the animation.
          requestAnimationFrame(animateMarker);
        }

        // Start the animation.
        requestAnimationFrame(animateMarker);
      }
    </script>
  </body>
</html>
